[airstrike]

FWIW I've recently moved from Firefox to Helium after 10+ years.

Yes, I hate that it's also Chromium, but no, there aren't real alternatives.

[ranger_danger]

There are Firefox forks that don't have any AI/advertising/etc. stuff in it.

There's also WebKit-based FOSS browsers not based on Chromium nor Gecko. Upstream it's maintained by Apple but the open source webkit browsers should not have any questionable features by default.